US7561775B2 - Fiber optic protective shutter - Google Patents
Fiber optic protective shutter Download PDFInfo
- Publication number
- US7561775B2 US7561775B2 US11/937,141 US93714107A US7561775B2 US 7561775 B2 US7561775 B2 US 7561775B2 US 93714107 A US93714107 A US 93714107A US 7561775 B2 US7561775 B2 US 7561775B2
- Authority
- US
- United States
- Prior art keywords
- protective
- protective cap
- coupler
- shutter
- fiber optic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 67
- 239000000835 fiber Substances 0.000 title claims abstract description 46
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 230000005670 electromagnetic radiation Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000000383 hazardous chemical Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- -1 Polyethylene Terephthalate Polymers 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3847—Details of mounting fibres in ferrules; Assembly methods; Manufacture with means preventing fibre end damage, e.g. recessed fibre surfaces
- G02B6/3849—Details of mounting fibres in ferrules; Assembly methods; Manufacture with means preventing fibre end damage, e.g. recessed fibre surfaces using mechanical protective elements, e.g. caps, hoods, sealing membranes
Definitions
- light-guide fibers are used in optical transmission systems wherein the fibers are connected end-to-end to transfer light or optical energy.
- fiber ends may be damaged by adverse environmental hazards, particularly at the location where optical fibers terminate in connectors. In particular, dust, dirt, and debris may impair the optical transmission capabilities of the fiber.
- dust, dirt, and debris may impair the optical transmission capabilities of the fiber.
- a laser beam passes through the fiber, an operator's eyes may easily be injured while the connector is not in use or is not covered.
- the mating end of a fiber connector is often covered when not in use or not connected.
- the invention is directed to a protection system for a fiber optic coupling, the fiber optic coupling having a first housing with a guide slot in a side wall.
- the system includes a protective cap including a slot in a side wall and defining a passage for receiving the first housing whereby the protective cap slot aligns with the guide slot in the first housing, and a protective shutter pivotally connected to the protective cap for covering a distal end of the fiber optic coupling.
- the protective shutter can be configured to attenuate electromagnetic radiation in at least one of the near infrared range or the infrared range.
- the invention is directed to a protective shutter for a fiber optic coupler to prevent dust and other contaminants from entering the coupler.
- the shutter includes a protective cap configured to protect fibers in a fiber optic connection, and a lid pivotally connected to a protective cap.
- the protective shutter can be configured to attenuate electromagnetic radiation in at least one of the near infrared range or the infrared range.
- a protective shutter for a fiber optic connector that attenuates electromagnetic radiation and prevents dust and other contaminants from entering the connector may be provided. Foreign matter is substantially prevented from entering the housing. Guiding slots in the walls of the connector increase the ease with which the protective cover and the fiber coupler are connected. Ease of disassembly of the protective cap from a coupler is improved.
- FIG. 1 is an exploded, perspective view of a fiber coupler.
- FIG. 2 is an exploded, perspective view of a protective cap for use on a fiber coupler.
- FIG. 3 is an assembled, perspective view of a fiber coupler on which the protective cap is mounted.
- FIG. 4 is a side perspective cutaway view of a fiber coupler on which the protective cap is mounted.
- FIG. 5 is an assembled, perspective view of a fiber coupler on which the protective cap is mounted and in an open position.
- Embodiments of the invention provide products and techniques for protecting a fiber optic coupler from contamination by dust, debris or other environmental hazards.
- Exemplary embodiments of the invention include a protective cap and a protective shutter.
- the protective cap includes an open slot in the side that aligns with a guiding slot in the fiber coupler.
- the movable shutter covers the receiving recess in the protective cap and coupler, thereby preventing contamination from entering the coupler.
- the open slot in the side of the cap allows the user to remove the cap after it has been placed on the fiber coupler.
- the cap is slid off the coupler by inserting a tool in the slot and prying apart.
- the protective cap is configured to slide onto the fiber coupler for connection. Other embodiments are within the scope of the invention.
- a fiber optic coupler 10 includes a body 12 having a recess 14 and a guide slot 16 .
- the recess 14 is configured to receive fiber optic cables when the cables are inserted for connection.
- the recess 14 comprises a center bore, or axial passageway through the first coupler 10 .
- the receiving recess 23 optically connects a fiber bundle.
- the guide slot 16 is positioned in a sidewall 20 of the coupler 10 and is configured to assist in the connection of the coupler 10 to a protective cover.
- the fiber coupler 10 may include a first housing and a second housing.
- the second housing can be a mirror image of the first housing positioned to connect to the first housing.
- a protective cap or cover 30 for the fiber coupler 10 includes a body 31 shutter 32 , a guide slot 34 , pivot connectors 36 , pivot arms 38 and a receiving recess 40 .
- the guide slot 34 is positioned in a sidewall 42 of the protective cover 30 .
- the shutter 32 is pivotally connected to the body 31 using pivot arms 38 that connect to pivot connectors 36 of the body 31 .
- the shutter 32 is configured to open and close via the pivot arms 38 .
- the pivot connection for example, is located on a distal end of the protective cap 30 .
- the protective shutter 32 pivots about the axis of the pivot connection from an open position to a closed position, in which the protective shutter 32 covers the passage or receiving recess 40 of the protective cap or cover 32 .
- the protective shutter 32 is configured to pivot to an open position in which the passage 40 is not covered.
- the protective shutter 32 is connected to the protective cap 30 via a horizontal or vertical slide movable connection. Other known means of connection are possible.
- the receiving recess 40 of the protective cap or cover 30 is configured to align with the receiving recess 14 of the fiber coupler 10 and receive fiber.
- the guide slot 34 is configured to substantially align with the guide slot 16 of the fiber coupler 10 when the protective cover 30 is positioned onto the fiber coupler 10 .
- the guide slot 34 can be, for example, positioned along a horizontal width of the protective cap or cover 30 , substantially midway between the top and bottom edges of the protective cap 30 .
- the protective shutter 32 is made of a material that attenuates electromagnetic radiation in the near IR and IR range.
- Conventional plastics used for protective caps may attenuate electromagnetic radiation (EM) in the visible range but may not attenuate EM in the IR and Near IR range (e.g., in the range of approximately 780 nm to 3000 nm). This near IR and IR EM cannot be seen by the human eye, but can still do considerable damage. Therefore, attenuation in this range can be crucial to true eye safety.
- the material properties of the cap are such that the polymers either provide adequate attenuation of electromagnetic radiation or the polymers are mixed with a material that will scatter and/or attenuate any potential radiation emitted from a “live” connector plugged into the housing.
- Such materials may include but are not limited to 30% glass filled Polyethylene Terephthalate (PET), thermoplastics with modest levels of carbon black filler, or various Near Infrared (NIR) absorbers that are made of highly absorbent, non-reflecting material.
- PET Polyethylene Terephthalate
- NIR Near Infrared
- the emitted radiation can be reduced to a level lower than the Maximum Permissible Exposure (MPE) limits for biological effects so as to limit any ocular damage that may otherwise occur while using a shutter with poor attenuation properties.
- MPE Maximum Permissible Exposure
- a coupling protection system 50 includes the protective cap 30 and the fiber coupler 10 .
- the housing of the fiber coupler 10 is inserted into the passage 40 of the protective cap 30 .
- the protective cap 30 slides over the body 12 of the coupler 10 , inserting axially into the passage 40 .
- the coupler 10 is inserted into the protective cap or cover 30 on a side opposite the distal end of the protective cap or cover 30 to which the protective shutter 32 is attached.
- the coupler 10 is inserted into the protective cap 30 in an orientation such that the guide slot 34 of the protective cap 30 substantially aligns with the guide slot 16 in the coupler 10 .
- the protective cap 30 remains in place over the coupler 10 through the use of contact friction and/or the use of snap tabs and recesses molded into the protective cap 30 and the coupler 10 respectively.
- the protective cap or cover 30 is retained in a position on the coupler 10 by contact friction.
- Other known means of retaining the coupler 10 in the cap 30 are possible and envisioned.
- the fiber optic coupling protection system 50 is assembled axially over the fiber coupler 26 .
- the receiving recess 14 is covered by the protective shutter 32 .
- the shutter 32 can be opened for insertion of a fiber connector into the receiving recess 14 .
- the protective shutter 32 is pivoted to an open position about the pivot connection which is connected to the distal end of the protective cap 30 and to the top edge of the shutter 32 , until the protective shutter 32 no longer obstructs the receiving recess 14 . If the fiber connector is removed, the protective shutter 32 resumes its closed position in which the shutter 32 covers the receiving recess 14 by pivoting about the pivot connection.
- the force required to pivot the protective shutter 32 to a closed position may be generated from many various sources, such as a spring attached to the pivot connection and configured to return the protective shutter 32 to the closed position, for example.
- the open guide slot 34 that is aligned with the coupler 10 guide slot 16 in the side of the cap 30 allows the user to remove the cap 30 when it is positioned on the fiber coupler 10 .
- the cap 30 is easily slid off the coupler 10 by inserting a tool in the slot and prying apart.
- the system 50 is exemplary only and not limiting as other system configurations can be used with embodiments of the invention.
Abstract
Description
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/937,141 US7561775B2 (en) | 2006-08-22 | 2007-11-08 | Fiber optic protective shutter |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/508,446 US7315682B1 (en) | 2006-08-22 | 2006-08-22 | Fiber optic protective shutter |
US94492607P | 2007-06-19 | 2007-06-19 | |
US11/937,141 US7561775B2 (en) | 2006-08-22 | 2007-11-08 | Fiber optic protective shutter |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/508,446 Continuation-In-Part US7315682B1 (en) | 2006-08-22 | 2006-08-22 | Fiber optic protective shutter |
Publications (2)
Publication Number | Publication Date |
---|---|
US20080101757A1 US20080101757A1 (en) | 2008-05-01 |
US7561775B2 true US7561775B2 (en) | 2009-07-14 |
Family
ID=39330282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/937,141 Expired - Fee Related US7561775B2 (en) | 2006-08-22 | 2007-11-08 | Fiber optic protective shutter |
Country Status (1)
Country | Link |
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US (1) | US7561775B2 (en) |
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US20100322561A1 (en) * | 2009-06-18 | 2010-12-23 | Protai Photonic Co. Ltd. | Optical fiber connector and adapter |
US20130063720A1 (en) * | 2010-05-05 | 2013-03-14 | Afl Telecommunications Llc | Interferometer adapter cap for an optical fiber inspection microscope |
US8465317B2 (en) | 2011-10-05 | 2013-06-18 | Senko Advanced Components, Inc. | Latching connector with remote release |
US8974124B2 (en) | 2012-08-16 | 2015-03-10 | Senko Advanced Components, Inc. | Fiber optic connector |
US9188747B2 (en) | 2011-05-23 | 2015-11-17 | Senko Advanced Components, Inc. | True one piece housing fiber optic adapter |
US9268103B2 (en) | 2013-05-10 | 2016-02-23 | Senko Advanced Components, Inc. | Interlockable fiber optic connector adaptors |
US9274287B2 (en) | 2014-05-13 | 2016-03-01 | Senko Advanced Components, Inc. | Optical fiber connector and ferrule |
US9297964B2 (en) | 2014-04-18 | 2016-03-29 | Senko Advanced Components, Inc. | Optical fiber connector assembly |
US9360649B2 (en) | 2013-05-22 | 2016-06-07 | Senko Advanced Components, Inc. | Cable guide for fiber optic cables |
US9477049B2 (en) | 2013-12-20 | 2016-10-25 | Senko Advanced Components, Inc. | Lockable connectors and connection assemblies |
US9494745B2 (en) | 2015-01-16 | 2016-11-15 | Senko Advanced Components, Inc. | Sealable communication cable connection assemblies |
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Cited By (102)
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---|---|---|---|---|
US20100322561A1 (en) * | 2009-06-18 | 2010-12-23 | Protai Photonic Co. Ltd. | Optical fiber connector and adapter |
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US20130063720A1 (en) * | 2010-05-05 | 2013-03-14 | Afl Telecommunications Llc | Interferometer adapter cap for an optical fiber inspection microscope |
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US9188747B2 (en) | 2011-05-23 | 2015-11-17 | Senko Advanced Components, Inc. | True one piece housing fiber optic adapter |
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US9360649B2 (en) | 2013-05-22 | 2016-06-07 | Senko Advanced Components, Inc. | Cable guide for fiber optic cables |
US9618703B2 (en) | 2013-10-03 | 2017-04-11 | Senko Advanced Components, Inc. | Connector housing for securing an optical cable and methods of use and manufacture thereof |
US9477049B2 (en) | 2013-12-20 | 2016-10-25 | Senko Advanced Components, Inc. | Lockable connectors and connection assemblies |
US9535230B2 (en) | 2014-01-31 | 2017-01-03 | Senko Advanced Components, Inc. | Integrated fiber optic cable fan-out connector |
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US9274287B2 (en) | 2014-05-13 | 2016-03-01 | Senko Advanced Components, Inc. | Optical fiber connector and ferrule |
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